Hot greenhouse or hot glasshouse: it is a closed and heated room where sowing seeds that suffer low temperatures.
Cold greenhouse or cold glasshouse: it is a closed but not heated room, where in any case, temperature doesn’t decrease under 5 C degree.
Planting or bedding: seed is puts in its conclusive position where it produces its frutis.
Transplanting: it’s the operation to put out door the plant in its conclusive position.
Each plant has its kind of seeding: read the indications for every seed so not to get wrong and loose the right time for seeding.